The blog you provided the link to is not a wordpress.com blog. Regardless of what widgets it may have, we run on different software than wordpress.org software. It will not work on this wp-MU wordpress.com multi-user blogging platform, unless specifically adapted to do so. Anyway, you can probably find out what it is by posting to http://wordpress.org/support

That's WordPress software, but not hosted here. Here at WordPress.com we can't use Flash on our blog, which is what that blog appears to be using. I agree it's cool, but it won't work here, ever. We have much more restrictive security requirements.

You can post images with a link to the full-size file, but it will just pop up in the window, not make a cool transition like that.